After you have started editing, Click the Editor menu again, then Editing Windows, Create Features.
This opens the "Create Features" panel . Click the type of feature you want to place on the map, then click on the map to place it.
Once the point is on the map, click the Attributes button to add attributes, or edit in the table.
Save Edits and Stop Editing.
You might benefit from some of ESRI's free online training: https://www.esri.com/training/
Good luck!
Jay
Jay
Washoe County GIS